Thread tension adjusting device

ABSTRACT

The present disclosure discloses a thread tension adjusting device comprising a body, a tension rod, an elastic element and an adjusting knob. A thread passing eye for inputting a thread is arranged below the body. A tension wheel and a thread passing wheel are rotatably arranged on the body. An adjusting knob is used for adjusting a rotational speed of the tension wheel. The elastic element has one end connected to the body and another end connected to the tension rod. The thread tension adjusting device may ensure stability of tensioning and transmitting of the thread by cooperation between the tension rod and the tension wheel, and improve precision for thread tension adjusting by the adjusting knob. In addition, the thread tension adjusting device may monitor thread breakage by the tension detector, and ensure operating stability and safety of the thread tension adjusting device.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is based upon and claims foreign priority benefits under 35 U.S.C. § 119(a)-(d) or 35 U.S.C. § 365(b) to Chinese application No. 201721534132.8, filed Nov. 16, 2017, the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to a winding apparatus, in particular to a thread tension adjusting device.

BACKGROUND

At present, a thread tension adjusting device used in an automatic winding apparatus for CIGS (copper indium gallium selenium) thread products is a non-active adjustment device, wherein a tension of a thread during operation process may be automatically adjusted by using an elastic force of an elastic piece after the thread passing through a guiding wheel. Such structure and its functions are too simple and have defeats such as unstable tension, inability to initiatively feed the thread and complicated threading, thereby leading to problems that the thread is easy to be broken off or knotted during operation.

SUMMARY

An objective of the present disclosure is to provide a thread tension adjusting device to overcome problems in the prior art, thereby improving tension adjusting precision and tension stability.

The present disclosure provides a thread tension adjusting device comprising:

a body;

a thread passing wheel rotatably arranged on the body;

a tension wheel rotatably arranged on the body;

a tension rod, having one end rotatably connected to the body and another end provided with a thread outlet wheel;

an elastic element, having one end connected to the body and another end connected to the tension rod;

an adjusting knob for adjusting a rotational speed of the tension wheel;

wherein the thread passing wheel, the tension wheel and the thread outlet wheel are successively wound by one end of a thread.

In the thread tension adjusting device as mentioned above, the elastic element may be a spring, a support fixedly arranged on the body, and the spring has one end fixedly arranged on the support and another end fixedly arranged on the tension rod.

In the thread tension adjusting device as mentioned above, the support may have a first branch and a second branch arranged thereon, and an angle may be formed between the first branch and the second branch. Moreover, a first hole may be arranged on the first branch, and a second hole may be arranged on the second branch. The spring may have one end fixedly connected to the first hole or the second hole.

The thread tension adjusting device may further comprise a limit knob for defining a rotational range of the tension rod, and the limit knob may be arranged on the body.

The thread tension adjusting device may further comprise a wire jump preventer, and the wire jump preventer may be fixedly arranged on the body and arranged between the thread passing wheel and the tension wheel.

The thread tension adjusting device may further comprise an adjusting wheel, and the adjusting wheel may be rotatably arranged on the body and arranged between the thread passing wheel and a thread passing eye.

In the thread tension adjusting device as mentioned above, preferably, the adjusting wheel may be a wool felt wheel.

The thread tension adjusting device may further comprise a position detector for detecting rotational position of the tension rod, and the position detector may be fixedly arranged on the tension rod.

The thread tension adjusting device may further comprise a position detector for detecting rotational position of the tension rod, and the position detector may be fixedly arranged on the tension rod.

In the thread tension adjusting device as mentioned above, the body may further have a work indicating lamp arranged thereon.

The thread tension adjusting device provided by the present disclosure may ensure stability of tensioning and transmitting of the thread by cooperation between the tension rod and the tension wheel, may realize that the rotational speed of tension wheel is adjusted according to tension requirements of the thread by providing the adjusting knob so as to improve precision for thread tension adjusting, and in addition, may realize monitoring of thread breakage by providing the tension detector, and may also ensure operating stability and safety of the thread tension adjusting device by cooperating a controller and a warning device to stop the machine in time.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural view of the thread tension adjusting device provided by an embodiment of the present disclosure.

The reference numbers are as follows:

-   -   100—body     -   110—thread passing eye     -   120—adjusting wheel     -   130—wire jump preventer     -   140—power indicating lamp     -   150—operating indicating lamp     -   200—tension wheel     -   300—tension rod     -   310—thread outlet wheel     -   400—thread passing wheel     -   500—adjusting knob     -   600—limit knob     -   700—spring     -   800—support     -   810—first branch     -   820—second branch     -   900—thread     -   10—initial position     -   20—working position

DETAILED DESCRIPTION

Embodiments of the present disclosure will be described in detail below and examples of these embodiments are shown in the accompanying drawings, wherein same or similar reference numbers denote same or similar elements, or elements having same or similar functions throughout the present disclosure. Embodiments described below with reference to accompanying drawings are exemplary, which are not merely intended to explain the present disclosure and cannot be interpreted as limitation of the present disclosure.

As shown in FIG. 1, an embodiment of the present disclosure provides a thread tension adjusting device comprising a body 100, a tension rod 300, an elastic element, and an adjusting knob 500. A thread passing eye 110 for inputting a thread 900 is arranged below the body 100. A tension wheel 200 and a thread passing wheel 400 are rotatably arranged on the body 100. The adjusting knob 500 is used to adjust a rotational speed of the tension wheel 200. More specifically, the tension wheel 200 may be driven to rotate by a driving device arranged in the body 100. The thread passing wheel 400 is arranged between the tension wheel 200 and the thread passing eye 110. One end of the elastic element is connected to the body 100 and another end of the elastic element is connected to the tension rod 300. One end of the tension rod 300 is rotatably connected to the body 100 and another end of the tension rod 300 is rotatably provided with a thread outlet wheel 310. One end of the thread 900 is successively wound around the thread passing wheel 400, the tension wheel 200 and the thread outlet wheel 310.

Specifically, the thread 900 passes through the thread passing eye 110, rounds the thread passing wheel 400 in a clockwise direction (viewed from FIG. 1), and then rounds the tension wheel 200 in an anti-clockwise direction. The tension rod 300 is adjusted to a suitable position by rotating, and the thread 900 which rounds the tension wheel 200 further rounds the thread outlet wheel 310 on the tension rod 300 in the anti-clockwise direction, so that tensioning and transmitting of the thread 900 is completed. It should be noted that the position of the tension rod 300 may be adjusted according to types of the thread 900 to meet various tensioning requirements of the thread 900 of different materials and to realize versatility of tensioning and transmitting of the thread 900 with various types. If the thread 900 is too tight or too loose, a worker may rotate the adjusting knob 500 to control the rotational speed of the tension wheel 200, so that the thread 900 is tensioned or loosened to achieve a purpose of adjusting a tensile force of the thread 900.

Specifically, the elastic element may be a spring, an elastic string or the like. In this embodiment, the elastic element is preferably a spring 700. A support 800 is fixedly arranged on the body 100. One end of the spring 700 is fixedly arranged on the support 800, and another end of the spring 700 is fixedly arranged on the tension rod 300. When the spring 700 is in a natural state, a tensile force of the tension rod 300 to the spring 700 and a tensile force of the support 800 to the spring 700 are balanced. At this time, the tension rod 300 is in an initial position 10. During operation, the rotational speed of the tension wheel is adjusted according to the rotational speed with which the thread is wound. The tension rod and the spring may balance a force applied on the thread, so that the tension rod is rotated within a setting range to optimize the tensile force of the thread. When the tension rod is rotated out of the setting range, the thread may be for example broken off or knotted so that a warning device generates a warning signal to remind the worker to stop the thread adjusting device.

Of course, adjustment of the tension rod 300 is not limited to use the spring 700. A gear assembly may also be arranged in the body 100 so that the tension rod 300 is connected to the gear assembly, and the position of the tension rod 100 is adjusted by driving the gear assembly.

In addition, the thread tension adjusting device may further comprise a limit knob 600 for defining a rotational range of the tension rod 300. The limit knob 600 may be arranged on the body 100. The worker may manipulate the limit knob 600 to define the rotational range of the tension rod 300, in which a swinging angle of the tension rod 300 is no more than 45°. In this embodiment, the swinging angle of the tension rod 300 is preferably no more than 30°.

Specifically, a first branch 810 and a second branch 820 are arranged on the support 800, and an angle is formed between the first branch 810 and the second branch 820. A first hole is arranged on the first branch 810, and a second hole is arranged on the second branch 820. One end of the spring 700 is fixedly connected to the first hole or the second hole.

In other words, the first hole and the second hole provide two different fixing positions. When the spring 700 is fixed, one of these holes may be chosen to fix the spring according to tensioning requirements of the thread 900, so that the tension rod 300 has different rotation adjusting ranges and thus satisfy tensioning requirements of various types of threads 900, and at the same time, the thread 900 output from the thread outlet wheel 310 may have different transmitting directions to satisfy tensioning requirements of various types of threads 900.

Further, in order to prevent a problem of thread jumping during the thread 900 transmitted from the thread passing wheel 400 to the tension wheel 200, the thread tension adjusting device may further comprise a jump preventer 130 which may be fixedly arranged on the body 100. More specifically, the wire jump preventer 130 may be arranged between the thread passing wheel 400 and the tension wheel 200.

In addition, the thread tension adjusting device may further comprise an adjusting wheel 120. The adjusting wheel 120 may be rotatably arranged on the body 100. More specifically, the adjusting wheel 120 may be arranged between the thread passing wheel 400 and the thread passing eye 110, so as to prevent an axial deviation of the thread 900 inputting from the thread passing eye 110 to the thread passing wheel 400, thereby ensuring stability of transmitting the thread 900. Specifically, a surface of the adjusting wheel 120 contacting with the thread 900 may be provided with a layer of film made of flexible material (such as fiber, cotton and felt), so that impurities, burrs and the like on the thread 900 may be smoothed during transmission of the thread, so as to ensure quality and state of the thread 900 during transmission, and at the same time, to reduce the number of thread wear phenomena. Moreover, the adjusting wheel 120 may be wool felt wheel.

In addition, the thread tension adjusting device may further comprise a position detector which is fixedly arranged on the tension rod 300. The position detector may be electrically connected to the controller. The thread tension adjusting device may further comprise a warning device. When the position detector detects that the tension rod 300 is deviated from the setting range during working process, the warning device may provide an alarm to prevent problems such as a case that the thread 900 is knotted or broken off since the tension rod 300 is operating in an incorrect position.

Further, in order to enable the worker to intuitively observe a power-on state of the thread tension adjusting device, a work indicating lamp 140 may also be arranged on the body 100 and connected to the controller. When the controller is powered on, the work indicating lamp 140 may illuminate. The work indicating lamp may include a power indicating lamp and an operating indicating lamp.

Specifically, the power indicating lamp 140 and the operating indicating lamp 150 may be identified by color. For example, the power indicating lamp 140 may be green, and the operating indicating lamp 150 may be red. Of course, the two indicating lamps may also be identified by flicker frequency; this embodiment is not limited thereto.

The thread tension adjusting device provided by an embodiment of the present disclosure may ensure stability of tensioning and transmitting of the thread by cooperation between the elastic element, the tension rod and the tension wheel. The thread tension adjusting device may realize adjusting of the rotational speed of tension wheel by the adjusting knob according to force of the wound thread, so as to improve precision for thread tension. In addition, the thread tension adjusting device may realize monitoring of thread breakage by providing a tension detector, and may also ensure operating stability and safety of the thread tension adjusting device by cooperation of a controller and a warning device to stop the machine in time. When the thread tension adjusting device is not wound by the thread, the tension rod is located at the initial position 10.

Configurations, features and effects of the present disclosure are described in detail according to the foregoing embodiments shown in the accompanying drawings. However, these embodiments mentioned above are merely preferred embodiments of the present disclosure. In should be noted that various equivalents will be reasonably combined according to features mentioned in the foregoing embodiments and their preferred implementations without departing from or changing the design idea and technical effects of the present disclosure. Therefore, the implementation range of the present disclosure is not limited by those shown in the accompanying drawings and all equivalent embodiments with changes or modifications, without departing from the spirit cover by the description and accompanying drawings, based on the concept of the present disclosure should be within the protection scope of the present disclosure. 

What is claimed is:
 1. A thread tension adjusting device, comprising: a body; a thread passing wheel rotatably arranged on the body; a tension wheel rotatably arranged on the body; a tension rod, having one end rotatably connected to the body and another end provided with a thread outlet wheel; an elastic element, having one end connected to the body and another end connected to the tension rod; an adjusting knob for adjusting a rotational speed of the tension wheel; wherein the thread passing wheel, the tension wheel and the thread outlet wheel are successively wound by one end of a thread.
 2. The thread tension adjusting device according to claim 1, wherein the elastic element is a spring, a support is fixedly arranged on the body, and the spring has one end fixedly arranged on the support and another end fixedly arranged on the tension rod.
 3. The thread tension adjusting device according to claim 2, wherein the support has a first branch and a second branch arranged thereon, an angle is formed between the first branch and the second branch, a first hole is arranged on the first branch, a second hole is arranged on the second branch, and the spring has one end fixedly connected to the first hole or the second hole.
 4. The thread tension adjusting device according to claim 1, wherein the thread tension adjusting device further comprises a limit knob for defining a rotational range of the tension rod, and the limit knob is arranged on the body.
 5. The thread tension adjusting device according to claim 1, wherein the thread tension adjusting device further comprises a wire jump preventer, and the wire jump preventer is fixedly on the body and arranged between the thread passing wheel and the tension wheel.
 6. The thread tension adjusting device according to claim 1, wherein the thread tension adjusting device further comprises an adjusting wheel, and the adjusting wheel is rotatably arranged on the body and arranged between the thread passing wheel and a thread passing eye.
 7. The thread tension adjusting device according to claim 1, wherein the adjusting wheel is a wool felt wheel.
 8. The thread tension adjusting device according to claim 1, wherein the thread tension adjusting device further comprises a position detector for detecting rotational position of the tension rod, and the position detector is fixedly arranged on the tension rod.
 9. The thread tension adjusting device according to claim 8, wherein the thread tension adjusting device further comprises a controller and a warning device, and the position detector is electrically connected to the controller and the warning device.
 10. The thread tension adjusting device according to claim 1, wherein the body further has a work indicating lamp arranged thereon. 